5661456355943 has 2 divisors, whose sum is σ = 5661456355944. Its totient is φ = 5661456355942.

The previous prime is 5661456355937. The next prime is 5661456355969. The reversal of 5661456355943 is 3495536541665.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5661456355943 - 2²⁰ = 5661455307367 is a prime.

It is a super-2 number, since 2×5661456355943² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5661456355993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2830728177971 + 2830728177972.

It is an arithmetic number, because the mean of its divisors is an integer number (2830728177972).

Almost surely, 2^{5661456355943} is an apocalyptic number.

5661456355943 is a deficient number, since it is larger than the sum of its proper divisors (1).

5661456355943 is an equidigital number, since it uses as much as digits as its factorization.

5661456355943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960000, while the sum is 62.

The spelling of 5661456355943 in words is "five trillion, six hundred sixty-one billion, four hundred fifty-six million, three hundred fifty-five thousand, nine hundred forty-three".